Kinetics and Mechanism of the Oxidation of Benzyl Alcohol and Benzaldehyde by Aqueous Sodium Dichromate

1975 ◽  
Vol 53 (24) ◽  
pp. 3709-3713 ◽  
Author(s):  
Donald G. Lee ◽  
Udo A. Spitzer
Keyword(s):  
Reaction Mechanism ◽  
Kinetic Study ◽  
Benzyl Alcohol ◽  
Oxidation Rate ◽  
Activation Parameters ◽  
Sodium Dichromate ◽  
Benzyl Alcohols ◽  
Aqueous Sodium ◽  
Entropy Of Activation ◽  
The Difference

A kinetic study of the oxidation of a series of substituted benzyl alcohols and benzaldehydes by neutral aqueous sodium dichromate has been completed. The aldehydes are more resistant to oxidation because the reaction mechanism presumably involves hydration prior to oxidation, and under the conditions employed the extent of this hydration is suppressed. These conclusions are consistent with the activation parameters which indicate that the difference in oxidation rate is due to a more negative entropy of activation for the aldehydes.

scholarly journals A kinetic and mechanistic study of the osmium(VIII)-catalysed oxidation of crotyl alcohol by hexacyanoferrate(III) in aqueous Alkaline medium

2020 ◽  
Vol 44 (5-6) ◽  
pp. 295-300
Author(s):  
Priyamvada Sharma ◽  
Riya Sailani ◽  
Anita Meena ◽  
Chandra Lata Khandelwal
Keyword(s):  
Reaction Mechanism ◽  
Alkaline Medium ◽  
Activation Parameters ◽  
Mechanistic Study ◽  
Aqueous Alkaline Medium ◽  
Crotyl Alcohol ◽  
Catalysed Oxidation ◽  
Entropy Of Activation ◽  
Eyring Equation

The kinetics and mechanism of the osmium(VIII)-catalysed oxidation of crotyl alcohol by hexacyanoferrate(III) in aqueous alkaline medium is studied. The role of the osmium(VIII) catalyst is delineated to account for the experimental observations. A plausible reaction mechanism is suggested. Activation parameters such as the energy and entropy of activation are evaluated by employing the Eyring equation and are found to be 36.833 kJ mol−1 and −141.518 J K−1 mol−1, respectively.

scholarly journals Kinetics and Oxidation of Substituted Benzyl Alcohols by Phenyliodoso Acetate

2011 ◽  
Vol 8 (1) ◽  
pp. 264-268
Author(s):  
R. Girija ◽  
S. Aruna
Keyword(s):  
Correlation Analysis ◽  
Benzyl Alcohol ◽  
Activation Parameters ◽  
Butyl Alcohol ◽  
Water Medium ◽  
Rate Data ◽  
Benzyl Alcohols ◽  
First Order ◽  
Alcohol Water ◽  
Different Temperatures

Oxidation of benzyl alcohol and somemeta- andpara- substituted alcohols by phenyliodoso acetate (PIA) int-butyl alcohol–water medium (50:50) leads to the formation of corresponding benzaldehyde. The stoichiometry of the reaction was found to be 1:1. The reaction was first order each in substrate and oxidant concentrations. This reaction was studied at four different temperatures and the activation parameters were calculated. Correlation analysis was carried out using Taft’s and Swain’s dual substituent parameter (DSP) equation. The rate data ofmeta- compounds showed good correlation with (F,R) values,para-substituted benzyl alcohols showed good correlation with σIσR+A suitable mechanism has been proposed.

scholarly journals Benzyl Alcohol Oxidation on Carbon-Supported Pd Nanoparticles: Elucidating the Reaction Mechanism

ChemCatChem ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 3464-3473 ◽  
Author(s):  
Aditya Savara ◽  
Carine E. Chan-Thaw ◽  
Ilenia Rossetti ◽  
Alberto Villa ◽  
Laura Prati
Keyword(s):  
Reaction Mechanism ◽  
Benzyl Alcohol ◽  
Alcohol Oxidation ◽  
Pd Nanoparticles ◽  
Benzyl Alcohol Oxidation ◽  
Supported Pd

scholarly journals Poly(N-isopropylacrylamide-co-methacrylic acid) microgel stabilized copper nanoparticles for catalytic reduction of nitrobenzene

2015 ◽  
Vol 33 (3) ◽  
pp. 627-634 ◽  
Author(s):  
Zahoor H. Farooqi ◽  
Zonarah Butt ◽  
Robina Begum ◽  
Shanza Rhauf Khan ◽  
Ahsan Sharif ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Methacrylic Acid ◽  
Catalytic Reduction ◽  
Aqueous Media ◽  
Activation Parameters ◽  
Reducing Agent ◽  
Different Temperatures ◽  
Entropy Of Activation ◽  
Micro Reactors

Abstract Poly(N-isopropylacrylamide-co-methacrylic acid) microgels [p(NIPAM-co-MAAc)] were synthesized by precipitation polymerization of N-isopropylacrylamide and methacrylic acid in aqueous medium. These microgels were characterized by dynamic light scattering and Fourier transform infrared spectroscopy. These microgels were used as micro-reactors for in situ synthesis of copper nanoparticles using sodium borohydride (NaBH4) as reducing agent. The hybrid microgels were used as catalysts for the reduction of nitrobenzene in aqueous media. The reaction was performed with different concentrations of cat­alyst and reducing agent. A linear relationship was found between apparent rate constant (kapp) and amount of catalyst. When the amount of catalyst was increased from 0.13 to 0.76 mg/mL then kapp was increased from 0.03 to 0.14 min-1. Activation parameters were also determined by performing reaction at two different temperatures. The catalytic process has been discussed in terms of energy of activation, enthalpy of activation and entropy of activation. The synthesized particles were found to be stable even after 14 weeks and showed catalytic activity for the reduction of nitrobenzene.

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